Unlocking attachment for time-locks



(ModeL') r .H! PLPRUIM. UNLOGKING ATTACHMENT FOR TIMBLOGKS", N0.292,583. Patented Jan. 29, 1884.

-INVENTOR:

Y ATTORNEYS.

n4 PETERS. Phokvlilhognphu, Washington, 0T0

. combination-lock, O.

"UNITED I STAT S "PATENT OFFICE.

- l-IIRAMP1 PRUI1\I, OF GRAND HAVEN, MICHIGAN.

uNLocKlNe ATTACHMENT FVOR TIME-LOCKS.

SPECIFICATION formingpart of Letters Patent No. 292,583, dated January29, 1884 v Application filed August '1, 1883. Model) To'aZZ whom, itmay, concern:

Be it known that 1, Hrninu P.1PRU1M, of Grand Haven, in the countyrofOttawa and State of Michigan, have invented certain new and usefulImprovements in Unlocking Attachments for Time-Locks, of which the fol;lowing is a ful1, cle ar, and exact description.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similarletters of reference indicatecorrespondingparts in all the figures.

Figure 1 is an elevation of my improvement, shown as connectedwith atime-lock, part being broken away. Fig. 2 is a sectional elevation ofthe sameftaken through the broken ,line 0040, Fig. 1. Fig. 3 shows amodification of the same. Y

The object of this invention is to provide a means for opening a safe orvault door provided with a time-lock, in case the clock-work shouldbreak down or stop, so that it will not be necessary to break open thesaid door.

The invention consists in an unlocking attachment for time-locksconstructed with a weighted lever operated by'the mechanism of a.combination lock, and connected by a pawl and ratchet-wheel with a trainof gear-wheels operating a rack-bar provided with a trip-arm adapted toengage with the trip-latch of a timelock, so that the said latch can betripped by the continued movement of the said combination-lockmechanism, as will be hereinafter fully described.

A represents the door of a safe or vault, which is provided with atime-lock, B, and a .Tothe door A, between the locks BC, is secured aplate, D, with which is connected a plate, E, by short posts F.

To the plates D E is journaled atrain of gearwheels, G, and to thejournal of the first wheel in the train is journaled a weighted lever,H, in such a position that the said lever, when hanging free, or a pin,I, attached to it, will rest against the bolt J of the combination-lockC, so that thesaid lever willbe vibrated as the said bolt is moved outand in.

To the lever His pivoted a pawl, K, the engaging end of which is held bya spring, L,

against the teeth of a ratchet wheel, M, at-

tached to the journal of the first wheel of the train G, so that motionwill be given'to the said train of gear-wheels by the vibration ofthelever H. The journal of the first wheel of the train G is'provided witha second ratchetwheel and pawl, N O, to prevent the said j our- 'nalfrom being turned back by the friction of the pawl K in its returnmovement. Thetrain of gear-wheels G is formed of aseries of smallgear-wheels, each of which, except the last, meshes into the teeth of alarge gear-wheel rigidly connected with the next small gear wheel. Theteethof the last small gear-wheel of the series mesh into the teeth of arack-bar, 1?, which slides in bearings Q, secured to the plate E by theposts F, that fasten the said plate in place.

To the rack-bar which projects upward into such a position that itsupper end, or a pin attached to itSiipper end, will strike against thecurved rear edge of the latch S, and push the said latch S oft thecatch-pin T, attached to the latch U, allowing the said latch to dropaway from the end of the arm V, connected with the ordinary bolt-frameV, so that the bolts of the door can be pushed back and the said dooropened. With this construction the bolt J of the combination-lock 0would require to be moved out and in about six thousand times to bringtherack-bar I? to the position showninFig. 1, and about sixthousandtimes more to move the said bar P so far forward as to move the latch Sand releasethe latch U, so that aburglar or other unauthorized personwould not have time to open the door by means of my im- P is attached anarm, R,

provement before he would be interrupted by preciable distance; but incase it should be moved too far forward, and after it has been movedforward in unlocking the time-lock,the nut W can be screwed off, therack-wheel removed from its square spindle, and the said rack-bar movedback, when the rack-wheel and nut can be replaced. If desired, the rack-IOO bar I? can be placed in a vertical position, in which case the upperend of the said rack-bar will serve as an arm, R. to push back the latchS and allow the latch U to drop awayfrom the bolt V. The rack-bar I canbe replaced, if desired, by a chain, X, attached at one end to thejournal of the last gear-wheel of the train G, and connected at itsother end with the lower end of the lever Y, pivoted to the plate E orother suitable support, and connected at its other end with the latch Sby a chain or rod, Z. This modification is illustrated in Fig. 3.

If desired, the plates carrying the attachment may be mounted uponsprings, so that a heavy blow upon the safe will not be liable to jarthe parts of the said attachment out of. their proper positions.

I do not abandon or dedicate to the public any patentable feature setforth herein and not hereinafter claimed, but reserve the right to claimthe same either in a reissue of any pat cut that may be granted uponthis application orin other applications for Letters Patentthat I maymake.

I am aware that a springpressed lever having its lower arm restingagainst the bolt of a combination-lock and its upper arm provided withaspring-pressed pawl engaging a ratchet wheel, which is provided with apin engaging a gear-wheel fitted on a screw-spindle under a hingedtongue, whose free end rests against the bolt of a time-lock, is old,and I therefore do not claim such invention.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. An unlocking attachment for time-locks constructedsubstantially as herein shown and described, and consisting of aweighted lever connected by a pawl and ratchet-Wheel with a train ofgear-wheels operating a rack-bar provided with a trip-arm, to adapt theattachmentto be interposed between a combinationlock and a time-lock, asset forth.

2. In an unlocking attachment for timelocks, .the eo1nbination,with thebolt of a combination-lock and the trip-latch of a timelock, of theweighted lever H, the pawl and ratchet wheel K M, the train G ofgearwheels, and the rack-bar I, having trip-ar|n substantially as hereinshown and described, whereby the said latch will be tripped by thecontinued movement of the said bolt, as set forth. 7

In an unlocking attachment for timeloeks, the COlllbillZttlOll,Wibll thebolt of acombination-lock and the trip-latchof a time-lock, of aweighted lever connected by a pawl and ratchet with a train ofgear-wheels, and means, substantially as herein shown and described, forconnnunicating the motion given to the train of gear-wheels by the boltof the eombination-lock to the tripdatch of the ti me look, as and forthe purpose set forth.

HIRAM P. PRUDI. \Vitnesses;

J. A. STIXE, F. M. Srwxnnns.

